Comparing 2 models
Claude Opus 5.5 vs GLM 5.3
Benchmarks through
Verdict
Claude Opus 5.5 places higher on 4 of the 4 tasks where both are ranked. GLM 5.3 costs 50.6x less per input token. GLM 5.3 accepts 1.0x more context. Only GLM 5.3 has open weights for self-hosting.
- Choose Claude Opus 5.5 for OpenClaw (#1), Goose (#1), OpenHands (#1).
- Choose GLM 5.3 for you need to self-host.
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | Claude Opus 5.5 | GLM 5.3 | Source |
|---|---|---|---|
| Design Arena Coding | 1392 Elo | 1307 Elo | source · 2026-10-16 |
| Design Arena UI | 1378 Elo | 1314 Elo | source · 2026-10-16 |
| Design Arena Website | 1338 Elo | 1298 Elo | source · 2026-10-16 |
| FrontierMath Tiers 1-3 (Epoch AI) | 91.2% ± 1.7 | 68.8% ± 2.7 | source · 2026-09-22 |
| GPQA Diamond (Epoch AI) | 90.6% ± 1.9 | 90.9% ± 1.6 | source · 2026-09-22 |
| LiveBench Agentic Coding | 71.7% | 60.9% | source · 2026-10-16 |
| LiveBench Coding | 89.3% | 79.0% | source · 2026-10-16 |
| LiveBench Data Analysis | 80.3% | 70.2% | source · 2026-10-16 |
| LiveBench Instruction Following | 65.7% | 69.3% | source · 2026-10-16 |
| LiveBench Language | 86.3% | 79.9% | source · 2026-10-16 |
| LiveBench Math | 97.1% | 87.9% | source · 2026-10-16 |
| LiveBench Reasoning | 92.2% | 85.8% | source · 2026-10-16 |
| LMArena Agent | 17.2 | 2 | source · 2026-10-14 |
| LMArena Agent Bash Recovery | 13.6 | -0.1 | source · 2026-10-08 |
| LMArena Agent Steerability | 17.9 | 0.4 | source · 2026-10-14 |
| LMArena Agent Task Outcome | 19.4 | 3.8 | source · 2026-10-14 |
| LMArena Agent Tool Hallucination | 0.5 | 0.6 | source · 2026-10-14 |
| LMArena Creative Writing | 1534 Elo | 1456 Elo | source · 2026-10-15 |
| LMArena Instruction Following | 1536 Elo | 1476 Elo | source · 2026-10-15 |
| LMArena Long Query | 1531 Elo | 1481 Elo | source · 2026-10-15 |
| LMArena Math | 1508 Elo | 1491 Elo | source · 2026-10-15 |
| LMArena Text | 1508 Elo | 1479 Elo | source · 2026-10-15 |
| LMArena Text Factuality | 1509 Elo | 1466 Elo | source · 2026-10-15 |
| LMArena WebDev | 1811 Elo | 1621 Elo | source · 2026-10-13 |
| OTIS Mock AIME (Epoch AI) | 100% ± 0 | 91.1% ± 3.5 | source · 2026-09-22 |
| SimpleQA Verified (Epoch AI) | 72.2% ± 1.4 | 41% ± 1.6 | source · 2026-09-22 |
| Terminal-Bench (4.0) | 64.8% | 41.8% | source · 2026-10-16 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.